Well-sinking apparatus.



Patented July 21, 191.4n

14 SHEETS-SEBET 1.

. CHAPMAN.

WELL SINKING APPARATUS.

APPLICATION FILED APR.14,1913.

rlllllxv n r hmmm M. T. CHAPMAN.

WELL SINKING APPARATUS.

APPLICATION FILED APR.14, 1913.

' ymqw, Patenauuly 21, 1914.

14 SHEETS-SHEET 2.

M. T. CHAPMAN. WELL SINKING APPARATUS.

APPLICATION PILBD APR. 14,1913. lpww. APatented July 21,191.4b

14 SHEETS-SHEET a M. T. CHAPMAN. WELL SINKING APPARATUS.

APPLICATION FILED APB..14, 1913 'Patented .my 21, 1914,

14 SHEETS-SHEET 4.

M. T. CHAPMAN.

WELL SINKING APPARATUS.

APPLICATION FILED AIR. 14, 1913.

Patented. July 2l, 1,914.

14 SHEETS-SHEET 5.

M. T. CHAPMAN. WELL SINKING APPARATUS.

APPLICATION FILED APB..14, 1913. l plcg., Patented July 21, 1914.

M. T. CHAPMAN. WELL' SiNKING APPARATUS.

APPLIOATION FILED APE. 14, 191s. LLQACQQ Patented. July 21,1914,

' 14 SHEETS-SHEET 7.

M. T. CHAPMAN.

WELL SINKING APPARATUS.

f APPLIOATION FILED 11211.14, 191s.

'Patented July 21, 1914.

14 SHEETS-SHEET 8.

M. T. CHAPMAN. WELL SINKING APPARATUS.

APPLIOATION FILED APB.14. 1913. 1,104,409. Patented July 211, 1914.

14 SHEETS-SHEET 9e jig/7 M. T. CHAPMAN. WELL SI-NKING APPARATUS.APPLICATION FILED M1144, 1913.

Patented July 21, 1914..-

14 SHEETS-SHEET 10.

LAAAOQ.

law y" M. T. CHAPMAN. l WELL SINKING APPARATUS.

APPLICATION FILED APB.14, 1913. Lw4,409 Patented July 21, 1914 I 14SHEETS-SHEET 11.

IIIHIIIM 11- A WO"- a M. T. CHAPMAN.

WELL SINKING APPARATUS.

f APPLICATION FILED APR.14, 1913.

Lw4409, Ptennea July 21, 1914:.A

14 SHEETS-SHEET 12- @MMIII-IT f l I s M. T. CHAPMAN.

WELL SINKING APPARATUS.

APPLICATION FILBU M1111, 191s.

31, l 04.409., Patented July 21, 1914.

14 SHEETS-SHEET 13.

M. T. CHAPMAN.

WELL SINKING APPARATUS.

APPLICATION FILED APR.14, 1913.

191U4p4099 Patented July 21, 1914.

14 SHBETSSHEET 14.

lll/411111111111@ ED @TATE PATENT OFFIQE.

MATTHEW T. CHAPMAN, OF AURORA, ILLINOIS, ASSIGNOR TO THE AMERICAN WELLWORKS, OF AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

WELL-SINKING APPARATUS.

Patented July 2li, Mill/li.

Application filed April 14:, 1913. Serial No. 761,006.

To all 11i/10m it may concern lle it known that l', Mnfrvrunw T. @Har-MAN, a citizen ot thc United States, residing at L\urora, in the countyof Kane, in the State ot' Illinois`l have invented certain new anduseful Improvements in VVell-Sinking Apparatus, ot which the followingis a specification, reference being had to the accompanying drawings.

This invention relates to well sinking apparatus and has tor one of itsobjects the production of new and improved means for operating andcontrolling` the boring'pipe whereby it may be rotated with the properpressure upon it.

More particularly it is one of the ob]ects of my invention to provideone mechanism for controlling the pressure of the boring pipes down inthe well and to provide auxiliary means for raising and lowering theboring pipes independently or the tlrstmen tioned controlling meanswhereby the p ipe may be raised and lowered as desired w1thoutdisturbing the ordinary controlling mechanism.

It is another object of my invention to provide auxiliary means of thetype linst above described such that the boring pipe may be raisedgradually and dropped, either permitting theY entire weight of theboring pipes to drop onto the drill or only a certain desired proportionthereof, this jumping of the boring pipe being accomplished during thecontinued rotation of the pipe.

It is another object of thisinvention toprovide auxiliary means of thissame type such thatthe boring pipe may be raised `gradually andthereafter gradually lowered during its continued rotation.

It is another object of my invention to` provide an improved clampingmeans for rotating the pipe when the auxiliary means above described areused whereby the pipe may be properly rotated and may be lifted whendesired by the clamping means, but whereby the boring pipe shall be freeto move downward through the clamping means as the boring progresses.

lt is another object of my invention to provide new and improved meansfor driving the rotary whereby the power may be applied thereto to thebest advantage.

lt is another object of my invention to provide a new and improvedarrangement of clamping` means to be carried by one of the.,

turntables adapted to be mounted upon the rotary for the rotation ofboring pipes or well casing pipes of comparatively large diameter.

More particularly my invention relates to the provision of housings forthe screws which operate such clamping means, and to the provision oflocking means for preventing the gradual loosening of the clampingmeans.

Itis another object ot' my invention to provide new and improved meansadapted to be mounted upon the rotary for use in unscrewing and removingthe boring pipe from the well or for screwing them together and loweringthem into the well.

' It is another object of my invention to improve well sinking apparatusin sundry details hereinafter pointed out. l

The means by which l have accomplished these results are illustrated inthe drawings and are hereinafter speciically described. That which Ibelieve to be new and wish to cover by this application is set forth inthe claims.

In the drawings,-Figure l is a view of a well sinking apparatusembodying some of my improvements; Fig. 2 is a view showing thearrangement of the pulleys at the top of the derrick; Fig. 3 is a planView of the apparatus at the top of the well; Fig. i is a side elevationof the system of drumsby which the cables are controlled and operatedfor holding the boring devices i-n sus pension or for lowering them intoor taking them out of the well; Fig. 5 is an end view of the parts shownin Fig. 4; Fig. G is a central vertical section through the rotary andthe turntable mounted thereon, being substantially a section on line(3-6 ot' Fig. 7 g Fig. 7 is a horizontal section through the rotary,being substantially a section on line 7-7 ot Fig. G; Fig. 8 is a crosssection taken on line 8-8 of Fig. 7; Fig. 9 is alplan View partly insection of `Athe turntable shownin Fig. 6; Fig. 10 is a vertical crosssection through the end of one of the housings for the screws by whichthe pipe clamps are tightened, showing the means for Elocking the screwagainst rotation, and `showing said locking means in dotted lines 1in'inoperative position; Fig. 11 isa view of Itheparts shown in Fig. 10 asseen from the` right in that ligure; Fig. 12is a bottom plan .view ofthe base-plate; Fig. 13 is a central 4 on line 16-16 of Fig. 14; Fig. 17is a top view of the parts shown in Fig. 13; Fig. 18

is an elevation of the cam adapted to be used with the turntable shownin Fig. 17 for jumping the boring pipe; Fig. 19 is acentral 'verticalsection through the rotary equipped with the turntable shown in Fig. 17

provided with a cam which raises and lowers the boring pipe, but doesnot jump it; Fig. 20 is an elevation of the cam member shown in Fig. 19;Fig. 21 is a top plan view of the turntable adapted to be used with therotary for unscrewing the sections of the boring pipe, for removing itfrom the well, or for screwing said sections together when the boringpipe is to be replaced in the well; Fig. 22 is a central verticalsection through the parts shown in Fig. 21; Fig. 23 is a centralvertical section through substantially the same parts shown in Fig. 22,but with the boring pipe and the wrenches omitted therefrom; Fig. 24 isacross section through the lower end of the elevator or device by whichthe boring pipe is raised, being substantially a section on vline 24-24of Fig. 26; Fig. 25 is a side view of the elevator; Fig. 26 is a centralvertical section through the elevator; Fig. 27 is a horizontal sectionthrough the elevator,lbeing substantially a section on line 27-27 ofFig.25; Fig. 28 is an enlarged-detail, being a central vertical sectionthrough the elevator, showing the means carried by the elevator forgripping the pipe; Fig. 29 is an enlarged detail, being a cross sectionthrough the elevator and the pipe gripped thereby; Fig. 30 is a centralvertical section through the elevator at right angles to the sectionshown in Fig. 28; Fig.

' 31 is an enlarged detail showing the manner of mounting the grippingchains in the improved wrench shown in Fig. 21; Fig. 32 is an enlargeddetail, being substantially a section on line 32-'32 of Fig. 31; Fig. 33is an enlarged detail, being substantially a section on line 33-33 ofFig. 32; Fi 34 is a cent-ral vertical section through t e lower end ofthe boring rod equipped with my improved boring tool; Fig. 35 is a crosssection taken on line 35-35 of Fig. 34; Fig.

Y 36 is a perspective view of the valve located at the lower end of theboring rod; Fig. 37 is a central vertical section through a modifiedform of boring tool; Fig. 38 is a View of the bottom of the drill shownin Fig. 37; Fig. 39 is a central vertical section through still anotherform of drill; Fig. 40 is a cross section taken on line 40-40 of Fig.39; Fig.

' 65 41 is a central vertical section through still another modifiedformof drill; Fig. 42 is a section on line 42-42 of/F ig. 41; and Fig.43 is a section on line 43-43 of Fig. 42.

' Referring to the drawings 50 indicates a derrick o any appropriatetype' for raising the pump rods and holding them in position during theboring operation and for use in removing the pipes from the Well orinserting them therein.

51 is a shaft mounted upon the derrick adapted to be driven by powerapplied thereto through Ithe chain or belt 52 from any suitable sourceof power.

53 indicates a shaft journaled in a frame 54 (see Fig. 3) suitablymounted upon said derrek, said shaft being driven from the shaft 51 andadapted to drive through intermediate shafts and gears a rotary device55 (see Fig. 6). This rotary device 55, or rotary as it is called inthis specification, is adapted to have mounted upon it a number ofdiierent turntables depending upon the nature of the work to be done.4The turntable 56, shown in Figs. 3, 6 and 9, is provided with grippingdevices adapted to be tightened upon a comparatively large well tube orboring` pipe. When it is desired to bore a well the dei-rick 50 is setup at the desired point; a cable 57 is led over one of the pulleys 58 atthe top of the derrick, one end being suitably attached to the upper endof a large drill 59 (see Figs. 1, 3 and 9), the other end beingconnected to a drum GO which is revolubly mounted in the derrick and isdriven, as hereinafter described, from the shaft 51. With the connectionas described the drum 60 is rotated lifting the drill into verticalposition, the drill being then lowered into position eXtendingt-hroughthe turntable 56. The gripping devices of this turntable are thentightened about the drill and power is applied to the rotary for therotation of the turntable 56 and the drill 59, the drill being adaptedto beheld by the gripping devices against rotation relative to theturntable, but being adapted to descend relative to the turntable as thedrilling progresses.

borings as fast asthey are torn loose. When the drill has been sunksubstantially its entire length a second section of tube of the samesize is connected to the drill by means of screw threaded sleeves andthe boring proceeds to the' point where progress is stopped by rock orother strata which this form of drill is'not adapted to penetrate. Whenthe drilling by means of the drill 59 ceases the sections of pipe may beremoved from the well if desired if the strata through which the Wellhas been sunk up to that point are lirm enough to prevent caving. If theground is not firm it is necessary'to keep the well tube in the wellduring the further yprogress of the drilling.

The hollow drill 59 has fed to it a supply of water which washes awaythe' ystring of pipe from the with means device 70 by which Licence Whendrilling has ceased throughthe use of the drill 59, the turntable 56 isremoved from the rotary and a turntable 61 is mounted on the rotary, asshown in Figs. 13, 17 and 1S). 'lhis turntable 61 is adapted to grip asmaller pipe 62 which is let down in the well by the cable 57'. rlheboring pipe 62 is pro vided at its lower end with a drill of anysuitable type adapted to bore through rock or other hard substances, theboring pipe boing hollow and being adapted to have a stream of waterforced down through it for lloating'upward the borings torn loose fromthe bottom of the well. As the depth of the well increases and theweight of the boring pipe 62 correspondingly increases the cable 57willbe threaded through a pulley-block 68 in connection with the desirednumber of the pulleys 58 at the top of the de'rrick for the properhandling of the increased weight of the boring members.

As the boring progresses the weight of the boring pipes becomes so greatas to put an undue l.pressure upon the drilling unit. lt thereforebecomes necessary to support a portion of the weight of the boring pipesby means of the cable 57 during thevboring operation. To this end l haveprovided a hand-wheel 611 provided with a worm 65 meshing with aworm-gear 66 adapted to be connected as desired' with the drum 60,whereby the tension of the cable 57 can be regulated manually.

' lt is sometimes desirable ing pipo and the drill up and down in thewell. This might be`done to a limited degree by means of the hand-wheel64 as will be readily understood. l have found it much preferable,however, to provide other n'ieans for jumping the to jump the borboringpipe which will serve this purpose without disturbing the adjustment ofthe tension ofthe cable 57. l have accomplished this result by the useof a cam G7 (see Figs. 13, 17 and 18), which can be thrown intooperation whenever desired to periodically raise the boring pipe and tolet it drop abruptly. have provided also a cam 68 4operating in the samegeneral way except that it raises the boring pipe gradually and lowersit again gradually (see Figs. 19 and 20).

When the boring is progressing veach new section of the boring pipe isscrewed on to the 'top of the section last added by hand. lt issometimes-necessary, however, to remove'the entire string of boringpipe. When it becomes necessary to remove the entire well or to.`replace it remove from the rotary the the turntable v61 and mount lieuthereof a table` 69 in the well, l cam 67 or 68 and on the rotary in.which is held against rotation (see Figs.

l2 and 23). rlhe table 69 is lequipped for holding against'rotation thethe cable 57 is attached to the boring pipe, said device 70 being knownas an elevator. rlhe rotary 55 is then provided with means for grippingthe upper sections of pipe, while the lower sections are held againstrotation, with-thc result thatihe pipes are very speedily unscrewed,land withdrawn fromthe well or screwed together and replaced in the wellas thecase may be.

llt sometimes becomes necessary or desir-v able to lower a sand pump orother light tool into the well by means of a cable. For this purpose lhave provided a drum 71 which may be driven when desired from the shaft51. rl`he cable 72 is adapted to be wound thereon and to run from thedrum to one of the pulleys 58 in the top of the derrick. l make thedrum/'(1 of considerably larger diameter than the drum 60 and rotate itmuch more rapidly whereby a light tool can be lowered to the bottom of adeep well and be withdrawn therefrom in a comparatively short time.

l/Vhenever it is necessary to raise a comparatively light load a shortdistance, this can be accomplished by means of a cable running over oneof the pulleys 58 at 'the top of the derrick, said cable being woundabout af--spool 7 3 rotating with the shaft 51, the spool serving toexert a pull upon the rope so long as the cable is kept tight upon thespool as will be readily understood.

lComing now to detailed description' of the construction and referringparticularly to Figs. 3, 4t and 5, 74; indicates a shaft journaled inbearingsmo'unted upon the derrick 50, said shaft having the drum 71loosely mounted thereon, the drum 60 xed thereon and the worm-wheel 66fixed thereon. The drum 71 is provided with a brake-band 75 operating inany approved manner upon a flange carried by one drum, whereby the'drummay be held against rotation by a. complete tightening of the brake 75or may be slowed downto the desired rotation upon a partial tighteningof the brake, the brake-band being tightened by a-downward stroke of thelever 76, as will be readily understood. 77 indicates a spring tendingto hold the brake-band 75 out of operative contact with the drum 71. 78indicates al gear revolubly mounted upon the shaft 711 adjacentl to thedrum 71, said gear 78 andthe head of the drum 71 adjoining the gearbeing provided with fricltional surfaces whereby said 'parts may becaused to rotate together. "79 indicates a lever pivotally mounted uponthe framework of the derrick provided witha yoke 80 at its upper endoperating in a groove 81 in4 thehub'82 extending from'one end of thedrum 71. 83 indicates a crank pivotally mounted in the framework of thederrick 50 at 'the left-hand side thereof as seen in Fig. 4%, the lowerend of the crank being ico of the heads of the connected by a link 84with the lever 79, the construction being such that by a turning of thecrank rod 83 the lever 79 may be turned on its pivot and the drum 71` 5moved into or out of frictional engagement with the gear 78. 85indicates a sprocketchain connecting the sprocket-gear 78 with asprocket-gear 86 fixed upon the shaft 51 in line therewith. 87 indicatesa brakeband mounted upon a flange carried by one of the heads-of thedrum 60, said brake 87 being vadapted to be tightened upon the drum 60by a downward stroke of the lever 88 connected therewith, so as toeither slow down said drum or as to hold it against rotation. 89indicates a spring tendingto hold vsaid brake-band out of operativecontact with the drum 60. 90 indicates one member of aV clutch'revolublymounted upon the shaft 74, being driven from the shaft 51 by-means of asprocket-gear`91 fixed on said clutch member, a sprocket-gear 92 fixedon said shaft 51 and a sprocket-chain 93 lconnecting said two gears. 94indicates a clutch member feathered upon the shaft 74 adapted to be lidby means of a lever 95 int-o engagement with the clutch member 90, aswill be readily understood, whereby said drum 60 may be driven asdesired by the shaft 51.

The worm 65 is shown in Fig. 5 to be fixed upon a shaft 96, upon whichthe hand-,wheel 64l also is fixed, said shaft 96 being'slidablelongitudinally in the bearings 97 mounted on the framework of thederrick. It will be understood that when the Iworm 65 is supporting theweight of the Cil boring pipe through the cable 57 the pull upon theworm-gear 66 will be in counter'- clockwise direction in Fig. 5.`Whenever it is desired to raise or lower the boring pipe slightly thiscan he accomplished byhe manipulation of t-he hand-wheel 64. /Vhen,however, it is desired to raise the boring pipe any considerabledistance this result is to be accomplished by throwing the clutch member94 into engagement with the clutch member 90 when t-he drum 60 will berotated in clockwise direct-ion, as shown in Fig. 5, the worm 65y beingslid to the right, as shownin dotted lines in Fig. 5.

98--99 indicate sprocket-gears keyed or `otherwise fixed upon t-he shaft51 adapted 4to be connected by means of a sprockett chain 100I to anysuitable source of power.

101 indicates a sprocket-gear fixed upon the shaft 51, being connectedby means of a sprocket-chain 102 to a sprocketlgear 103 fixed upon theshaft .53, vwhich is mounted in the frame 54 located directly over the fwell. v 7

' Referring now to Figs. 3, Gand 7, 104 indicates an annular supportfixed upon the frame 54. As best shown in. Fig. 6, said. supl port isprovided near its lower end with an indicate sprocket-gears iixedlymounted upon shafts 109-110, respectively. 113-114 indicate shaftsmounted in suitable bearings on the frame 54 parallel with the shafts109-110, said shafts 113-114 being mount-- ed in alinement with eachother. 115-116 indicate sprocket-gears ixedly mounted upon said shafts113-114, respectively, in alinement with the sprocketgears 111-112, theGears 111-115 being joined by a sprocket-chain 117 and the gears'112-116being joined by a sprocket-chain 118. The shafts 113-114 have mountedupon their adjacent ends beveled gears 119-120, respectively, saidbeveled gears being fixed to said shafts, on opposite sides of the shaft53, `which extends at right anglesto the shafts 113-114. 121-122indicate beveled gears loosely mounted upon the shaft 53 and .meshingwith the beveled gears 119 120|. 123-124 indicate clutch members lxedlysecured t-o the gearsv 121-122, respectively. 125 indicates a clutchmember feathered ,l upon the shaft 53 between the clutch mem- 'bers123-124. y126 indicates a lever (see Fig. 8) pivotally mounted upon abracket 127 carried by one of the parts of the frame 54, said leverbeing forked at its lower end and Vprovided with studs or rollers 128adapted to work in a circumferential groove Yin the clutch member 125.As Awill be readily understood, by the manipulation of the lever 126theclutch member 125 can be held at an intermediatepoint whereby boththe gears 121 and 122 are permitted to remain at rest, or the clutch 125may be moved into engagementwith the clutch member 124 for driving theshafts 113-114 in opposite directions, or the clutch 125` may be movedinto engagement 4with the clutch member 123 for driving both of saidshafts in opposite directions, each shaft being driven in the re- Versedirect-ion from that when the driving isaccomplished through the gear122.

It will be seen that by the use of my improved driving mechanism theshafts 113-114 are driven in opposite directions and that consequentlythe gears 107-108 will be driven in opposite directions where by powerwill be transmitted evenly to both sides of the rotary 5.5 whereby thedriving of the rotary may be accomplished with a` minimum' of frictionandv lost motion. 1t`

. will be seen that by a stroke of the lever 126 incarico the directionof rot-ation of the rotary 55 may be changed.

Referring to Figs. 3, 6 and 9, it will be seen that the turntable 56comprises two frame members 129-130, 4each slidingly mounted upon two ofthe posts 131 which are removably mounted in upright position in therotary lhe turntable comprises further two cross-heads 132-133,adjustably mounted,as hereinafter described, upon the frame members129-130. 134 indicates a table having acentral opening adapted to bemounted upon the rotary 55 at its inner edge, adapted to support theparts of the tm'ntable in proper position.

Referring now to Fig. 9, 13S-136 indicate rods revolubly mounted in theframe members 129-130, respectively, each of said l rods 1235-136 beingscrew-;threaded, the threads at opposite ends of said rods being cut inthe opposite directions. Each of said rods is provided with a squaredcentral portion which works between oppositely dis posed iianges 137 ofsaid frame members serving to hold the rod againstlongitudinal movementand serving also as a means for turning the rod. Each of the cross-heads132--133 isscrew-threaded at its ends to receive the screws 135-136,upon which they are mounted, whereby the cross-heads are adapted to bemoved toward or from each other by a proper manipulation of said screws.133 indicates shafts lined in the cross-heads 132-133, each of which hasrevolubly mounted upon it two disks 139 which are spaced apart on saidshafts as desired by means of a plurality of Washers 140 also mountedupon said shafts. As is shown in lfig. 9, the disks 139 are adapted tobe brought into tight engagement with the well tube or boring pipe 59 bythe proper turning of the screw-rods 135-136,'said disks 139 beingadapted to grip the pipe so as to cause it to rotate with the turntable56, but permitting longitudinal movement of the pipe relative to theturntable.

Referring especially to Figs.,10 and 11,

141r indicates clips mounted in the frame members 129-130 at their ends,adapted to have mounted thereon vbrackets 142 which are adapted to beturned up on the clips 141, as indicated in dotted lines in Fig. 10, orto be turned down as shown in solid lines in said figure with the slots`143 in their free ends engaging the squared end portionsof thescrew-rods 13 5-136. By the use of these devices the screws 135-136 maybe kept from working loose during the operation of the machine.

As is best shown in Fig. 9, the fra-me members 12.9- and the cross-heads132-133 are in the form, of housings which serve to protect the screwsand the bearings of the disks 139 from the-dirt and water.v

Referring now to Figs. 6 and 12, 144 in- A,

support a cylinder 145. 146 indicates a shaftl provided with a handle147 at its outer end and provided with a pinion 143 at its inner endadapted to mesh with the teeth 149 of a rack formed on the lower edge ofthe cylinder 145./ 1t will be understood that the cylinder can be givena partial revolution on a vertical axis by` the rotation of the shaft146 by means of the handle 147. 150 indimates a sleeve mounted above thesleeve 145 on the inside of the support 104.

14s best shown in Fig. 7 the sleeve 150 is` provided with ribs or guides151 kadapted to slide in Correspondingly-shaped grooves 152 formed inthe annularsupport 104, said cylinder being slidable up and down inthesupport 104.

iis best shown in Figs. 6 and 19, the cylinders 145 and 150 are providedat their meeting edges with oppositely inclined lugs 153-154. By aturning of the handle 147,

consequently, rotating the sleeve 145, the sleeve 150 is caused to rise,the inclined lugs 154 riding up the inclined readily understood.

Referring now to Figs. 13 and 17, which show the cam members 67 inposition upon the rotary 55, it will be seen that said cam member 67 isprovided on its lower edge with a series of teeth 155 corresponding tothe teeth 156 on the upper edge of the cylinder 150. rllhe cam member 67is normally rotatable relative tothe support 104 and the cylinder 150,butit will be understood that when the cylinder 150 has been raised bythe turning yof the handle 147, as above described, the teeth 156 ofsaid cylinder are broughtv into engagement with the teeth 155 of the cammember, thus holdingthe cam member against rotation with `the rotaryrelative to the stationary parts.

The turntable 61 shown in ligs. 13 and 17 in position upon the rotary 55consists of two sections 157 and 158 which are joined together at theirinner ends, as hereinafter described, the outer end of each of which isslidably mounted upon one of the posts 131 carried by the rotary.. Asshown in Fig. 13, the inner ends of the sections 157-158 rest upon acentral sleeve or hub yportion 159 of the cam member 67, by which thesections are supported in proper alinement relative to each other.

As is best shown in lFig. 15 the sections 157-158 are connected togetherby means of bolts 160 which pass through laterally-exlugs 153 as will betending lugs 161, heavy washers 162. of rubf 'ber or other yieldingmaterial being mounted upon said bolts so that the sections 157-158 maybe permitted a slight swinging or pivotal movement relative to eachother. 163-164 indicate gripping devices mounted in suitable recesses inthe inner endsof the.

teeth on their' outer faces whereby they are adapted to grip the pipe 62and to cause it to rotate with 'the turntable as will be readilyunderstood. 1

166-167 indicate gripping devices pivotally mounted upon the sections157`158-l respectively. As best shown in Fig. 14, each of said grippingdevices 166-167 is providedwith four concave. arc-shaped faces, saidfaces being at different distances from the pins 168 by which thegripping devices are secured in position. As best shown in Figs. 16 and13 the operative arc-s haped faces of the gripping devices 166-167 areprovided with horizontally extending teeth whereby said devices areadapted to grip. the ipe 62 when in proper operative position toholdsaid pipe against movement longitudinally of itself relative to theturntable. It will be understood that the gripping devices 166-167 canbe turned on the pivot pins 168 so as to rovide for the'use of any ofthe operative aces of said gripping devices as desired according to thesize of the pipe 62. As is seen rom'Fig. 16 the gripping devices 166-167are located somewhat above the horizontal plane passing through thebolts 160. 169'indicates rollers re'volubly rotating .with the rotary bycam member 67.

' member. v

mounted on the turntable 61 in position directly over the rises 17 0 orcams proper of the cam member 67.

When the cylinder 14:5' in the position shown in Fig. 6 with thecylinder 150 in its lowermost position, and with the teeth 1560i saidcylinder accordinglyA out of mesh with the teeth 155 of the cam member67, upon the rot-ation of the rotary 55 the boring pipe 62 will berotated, the cam member 67 which it is suphowever, it becomes necessaryto jump the boring pipe 62, as hereinbefore described, he handle 147will begiven sufficient rotation to turnthe cylinder 145 relative to thecylinder, 150 to r'aise the cylinder 150 so that the teeth 156 thereofare brought into mesh with'the teeth 155 or' the ported. When,

then held against rotation whereupon the rollers 169 upon the continuedrotation of the rotary ride up the rises 170 ofthe cam hile'the grippingdevices 163- 164 will not hold the shaft. 62 against longitudinalmovement relative to the turntable, they Vdovexert sufficient downwardpressure upon the pivotal connection of the sections 157-158 to causesaid sections to swing slightly gripping devices 166-167, which havebeen normallyv out of operative position, to assume an operativeengagement with the borroller 169 reaches land shaft are permitted Thecam member 67 is relative to each other causing the ing pipe 62 wherebythe pipe 62 is carried upward with the turntable 61. When the the end ofthe rise 17 O of the cam member,the continued rotation of the turntablecarries the roller oil the end of the cam proper 1 7()l ltable and thepipe 62'to drop abruptly. As hereinbefore described when the jump takesplace when the roller 169 passes off the end of the rise 17 0, theentire weight of the boring pipe may be permitted to i'all upon thedrill at the bottom of the well. @n the other hand by meansof the cable57 the pipe 62 may be partially supported so-as to limit the When theturntable to drop, as above described, the inner ends 'of the sections157- 158 are brought into contact with the hub or sleeve 159 of the cammember thus torcing the sect-ions 157-158 again into alinement witheachother, moving the gripping devices 166167 out of operativeengagement with the pipe k62, vthus permitting the pipe 62 to fallwithout restraint except as it may be supported more or less by thecable 57.

Referring now to Figs. 19 and 20, in which the cam.member 68 issubstituted .for the cam member 67, 171 indicates the teeth on the cammember 68 corresponding to the teeth 155 of the Cam member 67, an172111- dicates the rises of said cam member 68 corresponding to therises 170 of the cammem-y ber 67. It will be understood that in the useofthe apparatus shown in Fig. 19 the operation is exactl the same asthat described in connection wlth Figs. 13 and 17 except that theturntable and pipe 62 are ,gradually raised and again graduall loweredby the cam member 68 instead o being gradually raised and permitted todrop. Fig. 19falso illustrates another expedient which may be practisedeitherin connection with the cam member 68 or withv the cam member 67.In this figure a pluralityof washers 17 3 are shown mounted upon theposts 131 interposed `between the'turntable 61 and the rotary 55. -Alike number of rings 174 may be mounted upon the hub or sleeve 159 forsupporting the inner ends of the sections 157.-158 on -aneven basis withthe outer ends of said turntable, said rings in the construction shownbeing provided. with ribs at their inner edges for holding the rings. inposition. The object of the use of these blocks is to ber68 or the cammember 67 to raise and lower the pipe 62 lto a limited extent ratherthan to the "fullI extent permissible by. the height of the rises ofthel cam members. When sucha blocking up expedient is prac-` tisedinconnection with the cam member 67 it is especially blocks 1.744shallbe formed of wood or other yieldingfmaterial tov take away a great.probloW upon the drill.

enable the use of the cam memdesirable that the rings or iso

